Color gradients were one of the earliest computer design tools in programs like PowerPoint and Paint, offering amateurs an opportunity to channel their inner Albers. Now, Jiwoong Jung—a young Seoul-based industrial designer—has applied gradients as a clever time-telling tool in a watch concept called Hidden Time.

The spartan design features numerals printed onto the glass face. In lieu of an hour hand, a gradient slowly cycles around to denote the time, gradually becoming darker from one o’clock to twelve o’clock. It’s a simple yet utterly elegant way to keep on schedule.